java.nio.BufferUnderflowException: at java.nio.Buffer.nextGetIndex(Buffer.java:472) at java.nio.ByteBufferAsShortBufferB.get(ByteBufferAsShortBufferB.java:93) at webcamstudio.mixers.MasterFrameBuilder.mixAudio(MasterFrameBuilder.java:93) at webcamstudio.mixers.MasterFrameBuilder.run(MasterFrameBuilder.java:131) at java.lang.Thread.run(Thread.java:662)